The Soviet Union issued the first space exploration stamp in 1957, commemorating the launch of Sputnik 1, the world's first artificial satellite.

The first U.S. space exploration stamp, issued in 1962, depicted astronaut John Glenn's historic orbital flight aboard the Friendship 7 capsule, marking a significant milestone in Project Mercury.

The Apollo 11 stamp, issued in 1969, showcased the historic moment when Neil Armstrong became the first person to walk on the moon, capturing the world's imagination.

The stamp issued in 1990 to mark the launch of the Hubble Space Telescope bore the theme 'Exploring the Cosmos,' highlighting the telescope's groundbreaking mission to study the universe.

The 'Earthrise' stamp, issued in 1969, featured the awe-inspiring photograph of Earth taken during the Apollo 8 mission, showcasing our planet's beauty and fragility.

The stamp issued in 1997 to celebrate the Mars Pathfinder mission bore the theme 'Exploring the Red Planet,' marking the first successful landing and exploration of the Martian surface.

The 'Saturn Encounter' stamp, issued in 2004, depicted the Cassini-Huygens spacecraft approaching Saturn, highlighting the mission's groundbreaking exploration of the planet and its moons.

The stamp issued in 2015 to mark the historic landing of New Horizons on Pluto bore the theme 'Pluto Revealed,' showcasing the mission's stunning images and discoveries that transformed our understanding of the dwarf planet.

The stamp issued in 2022 to commemorate the launch of the James Webb Space Telescope bore the theme 'Unveiling the Universe,' highlighting the telescope's potential to revolutionize our understanding of the cosmos.

The stamp issued in 2022 to mark the launch of the Artemis 1 mission, which paved the way for future human missions to the moon, bore the theme 'Journey to the Moon.'

The stamp issued in 2021 to commemorate the Perseverance rover's mission to Mars bore the theme 'Exploring Mars,' highlighting the rover's search for signs of ancient life and its exploration of the Martian landscape.

The stamp issued in 2019 to commemorate the 50th anniversary of the Apollo 11 moon landing bore the theme 'Giant Leap for Mankind,' paying tribute to this historic achievement and its lasting impact on humanity.

The stamp issued in 2018 to mark the successful launch of the SpaceX Falcon Heavy rocket bore the theme 'Falcon Heavy Launch,' highlighting the rocket's powerful capabilities and its potential to revolutionize space exploration.

The stamp issued in 2018 to commemorate the launch of the Parker Solar Probe bore the theme 'Touching the Sun,' highlighting the probe's groundbreaking mission to study the sun's corona and its impact on Earth's space environment.

The stamp issued in 2016 to mark the Juno spacecraft's mission to Jupiter bore the theme 'Exploring Jupiter,' showcasing the spacecraft's journey to study the planet's interior, atmosphere, and magnetic field.